US3588798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locating transducer array on keel
Assignee: United States Department of the Navy
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Filing: 1969-08-01
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Granted: 1971-06-28
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Expires: 1989-08-01
Abstract
Abstract TO LOCATE A SHIP-MOUNTED TRANSDUCER ARRAY WITH RESPECT TO THE FIRE CONTROL CENTERLINE OF THE SHIP, THE SHI IS ANCHORED, AND THREE ACOUSTIC PROJECTORS ARE SPACED ABOUT THE SHIP AT FIXED KNOWN POSITIONS. ONE ELEMENT OF THE ARRAY IS USED AS A RECEIVER FOR TWO OF THE PROJECTORS. THE SIGNAL OF THE NEAREST IS DELAYED TO NULL WITH THE SIGNAL OF THE OTHER PROJECTOR, AND THE PROCESS IS REPEATED FOR THE OTHER PAIR OF PROJECTORS. THE TWO INTERSECTING HYPERBOLAS PINPOINT THE ARRAY.
Inventors
- 👤 Milton D Papineau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:11
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72; G01S1/76; G01S1/80; G01S1/807; G01S5/00; G01S5/18; G01S5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |